Switch relays are integral components in various electrical systems, providing a means to control the flow of electrical power and manage high-current circuits using low-power control signals. These devices are commonly used across industries and are crucial in applications ranging from household electronics to large-scale industrial machinery. In this article, we will explore the basic functionality of switch relays, their types, and their wide range of applications.

What is a Switch Relay? A switch relay, also known simply as a relay, is an electrical device that allows a low-power signal to control the switching of a higher-power circuit. The basic operation of a relay involves an electromagnet, which, when energized, activates a set of contacts that either open or close the circuit. This action enables the control of larger currents, all while isolating the control circuit from the high-power circuit. The key components of a relay include： Electromagnet： When an electric current passes through the coil of the electromagnet, it generates a magnetic field.